Definition of unstable equilibrium
: a state of equilibrium of a body (as a pendulum standing directly upward from its point of support) such that when the body is slightly displaced it departs further from the original position — compare stable equilibrium
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“Unstable equilibrium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unstable%20equilibrium. Accessed 22 May. 2022.
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